Diffuser for electric fans.



G. H. MOLL.

DIFFUSBR FOR. ELECTRIC FANS.

APPLIOATION FILED JULY 14, 1913.

Patented Oct. 20, 1914.

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G. H. MOLL.

DIFPUSER F011 ELECTRIC FANS.

APPLICATION FILED JULY 14, 1913.

Patented 001.2111914.

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THE NORRIS PETERS CO1. PHOTO-1.111111, WASHING TUN. u l,

,-GUsTAv H. non., or sT. Louis, MISSOURI. l

nrrnusna nonv ELECTRIC Fans j Specification Knetters Patent. i

Patented oet. 2o, 1914.

Application :filed .Tuly 14, 1913. Serial No. 778,980.

To all whom 'it may concern: j

Be it known that I, GUsTAv H. MoLL, a citizen of the United States, andresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Diffusers for Electric Fans, of which the following is aspecication containing a full, clear, and eX act description, referencebeing had to the accompanying drawings, forming a` part hereof.

My invention relates to improvements in diffusers for electric fans, andthe object of my invention is to construct Ya device in the form of arotating blade arranged to be positioned in the path of air issuing fromablast fan whereby to serve as a deiiector to direct the air from theblast out of its regular course and thereby render an ordinary fan moreefficient and capable of covering a larger area. j

With the above purposes in view my invention consists in certain novelfeatures of construction and arrangement of parts as will be hereinaftermore fully described, pointed out in the claim and illustrated by theaccompanying drawing, in which- Figure 1 shows in elevation a devicecone structed according to myl invention in the form of an attachment toan electric fan;

Fig. 2 is a face view of the device of my invention, the supporting rodsthereof being shown in section and the view taken on the line 2-2 ofFig. l; Fig. 3 is a detail sectional plan of one of the blades and itssupport; Fig. 4 is a fragmental vertical section taken on the line 4;-4of Fig. 3; and Fig. 5 is a diagrammatical plan showing an ordif naryelectric fan, the arrangement of a pair of diffusing fans and various ofthe angles at which air may be diverted by the `diffusing fans.

As shown in the drawings and will be described in detail hereinafter thedevice of my invention is in the form of an attachment to an electricfan, but I do not wish to `be understood as limiting myself to thestructure as shown and described as I contemplate making the device invarious forms and not necessarilyy attachedto the primary fan or sourceof air current.

In the accompanying drawings the numeral 6 indicates an ordinaryelectric fan having the usual rotating blades and guard 8. Projectingforwardly and secured to the guard Sis a plurality of arms 9 andslidably connected with the arms 9 are the arms 10. Carried at the outerends ofthe arms 10 is a guard 11, and disposed within said guard 1l is apair of shafts12. Supported by each of said shafts and arranged forrotation within the guard 11 is a blade 13 which may be constructed inan infinite variety of forms, but whose essential characteristic is thatwhen it is subjected to a blast of air it will rotate.

The device of my invention is applicable to all forms of blast devices,however, I believe that it will be principally used in connection withelectric fans, whether they be the fixed stationary type, theoscillating type or the rotating type. j

`The blast from a stationary fan covers only a limited area and isconstant in a defined course. In oscillating and rotating fans the blast"over a defined area is Aintermittent. By placing a diffusing fanconstructed according to my inventionin the path of the blast from:either of the forms of primary fans noted, it is obvious that the saidprimary fan willfbe given a wider field of usefulness, nthat the diusingfan will deflect the blast out of its true course to a point or pointsout of the path ofthe direct vblast from the fan. j `By theprov'ision ofa rotating deiiector having a vane or vanes provided with oblique faces,the rotation of the blade is en-j` tirely automatic, that is whentheblast from j f a primary fanstrikes an oblique face of one f of thevanes the vane is caused to rotate,

of rotation will be varied according to the force of the blast from theprimary fan.

I claim: j

In combination with a power driven fan, a secondary fan comprisingablade mounted for rotation in the path of air from the power driven fan,said blade having a plane thus accomplishing the shifting of the debodyportion proyided at opposite .margins name to this specification, inpresence of two with oppositely bent portions forming oonsubscribingwitnesses. tinuations of the plane body portion, whereby the plane bodyportion will be :nitomztti-r GUSTAV H MOLL' 5 cally rotated by the blastfrom the power `Witnesses:

driven fan to change the course of the blast. E. L. WALLACE,

In testimony whereof, I have signed my JOHN C. HIGDON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

